Stepless regulation constant tension device for hydraulic winch

Abstract

The invention discloses a stepless regulation constant tension device for a hydraulic winch, consisting of a power pump set, a reversing valve, a hydraulic motor, a winch, a one-way valve, a balance valve and a motor safety valve, wherein the power pump set is connected with an oil inlet of the reversing valve; a first oil exchange port of the reversing valve is connected with an oil return port of the balance valve; an oil inlet of the balance valve is connected with a rope folding side oil port of the hydraulic motor; a rope release side oil port of the hydraulic motor is connected with a second oil reversing port of the reversing valve; an oil outlet of the reversing valve is connected with an oil tank; a control port of the balance valve is connected with an oil path between the rope release side oil port of the hydraulic motor and the reversing valve; the one-way valve is connected between the oil inlet and the oil return port of the balance valve in parallel; the motor safety valve is connected between the rope folding side oil port and the rope release side oil port of the hydraulic motor in parallel; and the winch is connected with the hydraulic motor. The device achieves the function of keeping the tension of a steel wire rope constant when the hydraulic winch is positioned under various work conditions and can be used for carrying out remote on-line adjustment on theoutput capacity of the hydraulic winch. The stepless regulation constant tension device has the advantages of simple structure, low cost, convenience for use and high safety.

Description

technical field [0001] The invention relates to a hydraulic winch, in particular to a stepless adjustment constant tension device of a hydraulic winch, which belongs to the field of hydraulic technology. Background technique [0002] At present, most of the machines used to lift and tow heavy objects such as cranes, towing machines, and mooring winches use hydraulic winches. With the continuous improvement of the rated lifting capacity of lifting machinery and the increasing complexity of the working environment of Higher requirements are put forward for the safety of hydraulic winches, not only requiring hydraulic winches to ensure slow, stable and controllable speed during hoisting, operation, acceleration, braking, etc., but also requiring hydraulic winches to adapt to load changes and maintain wire rope tension. Constant capacity to prevent safety accidents where the wire rope exceeds the maximum bearing capacity due to a sudden increase in load and breaks. Especially f...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the inability to realize the constant tension control of the steel wire rope under the braking condition of the existing hydraulic winch stepless adjustment constant tension device, the inability to realize the speed control of the rope unwinding under the unwinding condition, and the adjustment of the output capacity of the hydraulic winch Special tools are required to be carried out in the machine room, and the operation process is complicated and inconvenient. A hydraulic winch stepless adjustment constant tension device is provided to realize the function of the hydraulic winch to maintain a constant tension of the wire rope under various working conditions, and can effectively control The speed of unwinding the rope, and the ability to remotely and online adjust the output capacity of the hydraulic winch, has a simple structure, low cost, convenient use, and high safety

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